import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;

/**
 * @program: Learning
 * @description:
 * @Company: 终生学习
 * @author: peter.wei
 * @create: 2020-07-28 16:46
 **/
public class TestStr {
    public static void main(String[] args) {
        List<String> list = new ArrayList<>();
        list.add("1");
        list.add("2");
        list.add("3");
        String collect = list.stream().map(e -> "\'" + e + "\'").collect(Collectors.joining(", "));
        collect = "(" + collect + ")";
        System.out.println(collect);
        System.out.println(list.toString());

        System.out.println(getSingleSurveyUser("1212,3232"));
        System.out.println(getSingleSurveyUser(""));
    }

    public static String getSingleSurveyUser(String input) {
        if (input.length() > 0) {
            if (input.contains(",")) {
                return input.split(",")[0];
            } else {
                return input;
            }
        } else {
            return input;
        }
    }
}
